fixed : Similar guide links related to not found guide links

Spring Boot 3.3.4 Reference Doc. Changed the Not Found link provided in the Reference Doc to a link covering the Build Plugin. Reference Doc : https://docs.spring.io/spring-boot/how-to/deployment/traditional-deployment.html#howto.traditional-deployment.convert-existing-application Not Found Link : Getting Started Guide on Converting a jar to a war. ( https://spring.io/guides/gs/convert-jar-to-war/ )

spring-boot-project/spring-boot-docs/src/docs/antora/modules/how-to/pages/deployment/traditional-deployment.adoc

@@ -74,7 +74,7 @@ This means that, in addition to being deployable to a servlet container, you can
 
 To convert an existing non-web Spring application to a Spring Boot application, replace the code that creates your `ApplicationContext` and replace it with calls to `SpringApplication` or `SpringApplicationBuilder`.
 Spring MVC web applications are generally amenable to first creating a deployable war application and then migrating it later to an executable war or jar.
-See the https://spring.io/guides/gs/convert-jar-to-war/[Getting Started Guide on Converting a jar to a war].
+See the https://docs.spring.io/spring-boot/build-tool-plugin/index.html[build-tool-plugin].
 
 To create a deployable war by extending `SpringBootServletInitializer` (for example, in a class called `Application`) and adding the Spring Boot `@SpringBootApplication` annotation, use code similar to that shown in the following example: